3D Cursor ~ right click to move it around? ver 2.8
It should be old news by now, but you can revert to Blender 2.7x shortcuts and usability at any point. 

In the menu, go to "Edit- Preferences", select "Keymap" and you find all the changes in one place. 

In the upper row, you find the presets, where you can find a Blender 2.7x preset. Don't forget to hit "Save Preferences", before closing the window.



Depending on how proficient you are with Blender in general, this could also backfire, if you watch tutorials that are created using the new keymap. You definitely want to know your way around in Blender to be able to follow those.